yamaboshi ryuu, cesario (umamusume), umamusume, highres, 1girl, animal ears, aqua jacket, bikini, blue bikini, blue hair, blush, breasts, ear ornament, horse ears, horse girl, horse tail, jacket, large breasts, long sleeves, looking at viewer, multicolored hair, partially unzipped, purple eyes, short hair, side-tie bikini bottom, simple background, sitting, solo, swimsuit, tail, white background, white hair